Cross-site request forgery (CSRF) vulnerability in +F FS040U software versions v2.3.4 and earlier, +F FS020W software versions v4.0.0 and earlier, +F FS030W software versions v3.3.5 and earlier, and +F FS040W software versions v1.4.1 and earlier allows an adjacent attacker to hijack the authentication of an administrator and user's unintended operations such as to reboot the product and/or reset the configuration to the initial set-up may be performed.
https://www.fsi.co.jp/mobile/plusF/news/22102804.html
https://www.fsi.co.jp/mobile/plusF/news/22102803.html
https://www.fsi.co.jp/mobile/plusF/news/22102802.html